Drying equipment and drying method for production of hydroxypropyl methyl cellulose

Abstract

The invention belongs to the technical field of hydroxypropyl methyl cellulose production, particularly relates to drying equipment and a drying method for hydroxypropyl methyl cellulose production, and aims at solving the problems that in the existing filling process, hydroxypropyl methyl cellulose is prone to accumulation, raw materials are affected with damp again due to insufficient drying of the interior of a filling barrel, heat energy is dissipated, and the raw materials are wasted. According to the technical scheme, the drying equipment for hydroxypropyl methyl cellulose production comprises a drying cylinder, the outer wall of the drying cylinder is fixedly sleeved with a supporting ring, a plurality of supporting legs used for supporting are fixed to the bottom of the supporting ring, and a conveying belt is arranged below the drying cylinder and used for conveying filling barrels. And a bent pipe rotationally penetrates through the bottom of the drying cylinder and is used for discharging raw materials into the filling barrel, the dried raw materials can be uniformly filled into the filling barrel, so that the filling barrel can fully contain the raw materials, the inner wall of the filling barrel can be dried in the filling process, and the raw materials are prevented from being affected with damp in the filling barrel.

Description

Technical Field

[0001] The invention relates to the technical field of hydroxypropyl methylcellulose production, and in particular to drying equipment and a drying method for producing hydroxypropyl methylcellulose. Background Art

[0002] Hydroxypropyl methylcellulose is widely used in synthetic resin, petrochemical, ceramic, papermaking, leather, medicine, food and cosmetics industries, so its market demand is large. In its production and processing, drying is an essential process.

[0003] The prior art still has the following shortcomings when drying: 1. After drying, hydroxypropyl methylcellulose needs to be filled. However, when filling through the discharge pipe, it tends to accumulate in the center of the filling barrel, causing it to overflow from the filling barrel, thus affecting the filling volume of the filling barrel; 2. The inside of the filling barrel cannot be dried during the filling process, which may cause the dried hydroxypropyl methylcellulose to become damp again in the filling barrel; 3. Hydroxypropyl methylcellulose is usually dried using hot air. However, after drying, the hot air directly carries moisture and is discharged to the outside, which not only wastes heat energy, but also may entrain hydroxypropyl methylcellulose, thus causing waste.

[0004] In view of the above problems, the present invention document proposes a drying device and a drying method for the production of hydroxypropyl methylcellulose. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings that hydroxypropyl methylcellulose is easily accumulated in one position during the existing filling, the inside of the filling barrel cannot be dried, resulting in the hydroxypropyl methylcellulose being damp again, the heat energy being dissipated, and the raw materials being wasted, and a drying device and a drying method for the production of hydroxypropyl methylcellulose are proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A drying device for the production of hydroxypropyl methylcellulose, comprising a drying cylinder, a support ring is fixedly sleeved on the outer wall of the drying cylinder, a plurality of support legs are fixedly mounted on the bottom of the support ring, a conveyor belt is arranged below the drying cylinder for transporting filling barrels, and a bending pipe is rotatably penetrated through the bottom of the drying cylinder for discharging the raw materials into the filling barrels; It also includes an air injection ring sleeve, which is sleeved on the outer wall of the drying cylinder and is used to inject hot air into the drying cylinder to complete the drying operation. A filter box is fixed on one side of the drying cylinder, and a return air hose is provided at the bottom of the filter box for injecting hot air into the air injection ring sleeve; It also includes an exhaust pipe, which is arranged on the top of the drying cylinder, one end of which is connected to the filter box and is used to recover the hot air and raw material dust in the drying cylinder; An air guide pipe is arranged on one side of the drying cylinder, and an exhaust plate is fixed at the bottom end of the air guide pipe, which is used to dry the filling barrel to be filled; A drying structure, arranged in the drying cylinder, for drying the raw materials in the drying cylinder; A drying structure is arranged below the drying cylinder and is used to dry the filling barrel to be filled; The material discharging structure is arranged in the drying cylinder and is used to fill the dried raw materials into the filling barrel; The recovery structure is arranged in the filter box and is used for recovering hot air and raw material dust.

[0007] In a possible design, the drying structure includes a stirring shaft rotating on the inner wall of the top of the drying cylinder, a driving motor is fixed on the top of the drying cylinder, the output shaft of the driving motor is fixedly connected to the top of the stirring shaft through a coupling, the outer wall of the stirring shaft is provided with a sliding cylinder through a slide groove and a sliding sleeve of a slider, a plurality of stirring blades for stirring the raw materials are fixed on the outer wall of the sliding cylinder, a plurality of first air injection holes are provided in the drying cylinder, a plurality of second air injection holes are provided on the inner wall of the air injection ring sleeve, and the first air injection holes cooperate with the second air injection holes to inject hot air into the drying cylinder, an air inlet pipe is fixed on one side of the filter box, a valve is provided in the air inlet pipe, which is used to inject outside air into the filter box for heating, and a valve is provided on one side of the filter box close to the air inlet pipe. A plurality of heating plates are fixed to the inner wall on the side for heating the air entering the filter box. A fan is fixed to the bottom of the filter box through a frame. The air inlet of the fan extends into the filter box. The air outlet of the fan is connected with an air return hose. One end of the air return hose is connected with an air injection ring sleeve. The valve on the air inlet pipe is opened, and the fan is operated to draw the outside air into the filter box through the air inlet pipe. The heating plates are used to heat the air. Then the fan injects the hot air into the air injection ring sleeve through the air return hose. The first air injection hole is connected with the second air injection hole. The hot air in the air injection ring sleeve is injected into the drying cylinder for drying the raw materials. Then the driving motor drives the stirring shaft, the sliding cylinder and the stirring blades to rotate, so as to stir the raw materials and make them dry evenly.

[0008] In a possible design, the drying structure includes two connecting arms at the bottom of the drying cylinder, the bottom ends of the two connecting arms are fixed with the same horizontal plate, the bottom end of the air duct passes through the horizontal plate, a valve is arranged in the air duct, the outer wall of the air duct is rotatably sleeved with a connecting sleeve, a plurality of air holes are arranged at the bottom of the exhaust disk for drying the inner wall of the bottom of the filling barrel, a plurality of arc holes are arranged on the outer wall of the exhaust disk for drying the inner wall of the filling barrel, and the hot air cooperates with the arc holes to drive the exhaust disk to rotate, the top end of the air duct is rotatably connected to the connecting corrugated hose, and the connecting corrugated hose is connected to the return air hose for injecting hot air into the exhaust disk; the air duct and the exhaust disk move downward and extend into the filling barrel, at which time the fan injects hot air into the exhaust disk, and dries the inner wall of the bottom of the filling barrel through the air holes, and in addition, the hot air flows outward through the arc holes, and the cooperation of the hot air and the arc holes drives the exhaust disk to rotate, so as to dry the inner wall of the filling barrel.

[0009] In a possible design, the discharge structure includes a closed cone arranged in the drying cylinder, and the outer wall of the closed cone fits with the inner wall of the drying cylinder to seal the bent tube, the bottom end of the stirring shaft passes through the closed cone, the stirring blade located at the bottom cooperates with the top of the closed cone, a plurality of support rods are fixed to the bottom of the closed cone, the bottom ends of the plurality of support rods all slide through the bottom inner wall of the drying cylinder and are all fixed with the same connecting ring, an electric push rod is fixedly embedded at the bottom of the drying cylinder, the output shaft of the electric push rod is fixedly connected to the top of the connecting ring, a connecting rope is provided at the top of the connecting ring, the other end of the connecting rope is fixedly connected to the connecting sleeve, a guide wheel is rotatably connected between the two connecting arms to guide the connecting rope, and the outer wall of the bent tube is fixed with a sleeve A first synchronous wheel is provided, and the outer wall of the air guide pipe is slidably connected to the second synchronous wheel through a slider and a slide groove, and the second synchronous wheel is rotatably connected to the bottom of the cross plate, and the first synchronous wheel and the second synchronous wheel are connected through a synchronous belt transmission; the output shaft of the electric push rod drives the closed cone to move up through the cooperation of the connecting ring and the support rod, and releases the sealing of the closed cone on the bending pipe. At this time, the dried raw materials are discharged into the filling barrel through the bending pipe. At the same time, the connecting ring extends the exhaust disk into the filling barrel through the cooperation of the connecting rope, and drives the air guide pipe to rotate when the exhaust disk rotates. The air guide pipe drives the bending pipe to rotate through the cooperation of the first synchronous wheel, the second synchronous wheel and the synchronous belt. When discharging, the raw materials can be discharged in a ring shape in the filling barrel to avoid the accumulation of raw materials in one position, so that the filling barrel can be filled with more raw materials.

[0010] In a possible design, the recovery structure includes a bending plate fixed in the filter box, the air inlet pipe is located above the bending plate, a polytetrafluoroethylene membrane is fixed in the bending plate, which is used to filter moisture in the hot air and raw material dust, a knocking rod is sealed and slidably penetrated in the filter box, and the knocking rod is used to knock the bending plate, a trapezoidal groove is provided on one side of the knocking rod, a lifting plate is slidably connected to one side of the filter box, the bottom end of the lifting plate is fixedly connected to the top of the connecting sleeve, a plurality of fixed columns are fixed on one side of the lifting plate, and the fixed columns cooperate with the trapezoidal groove to drive the knocking rod to move outward, and the knocking rod A connecting plate is fixed at one end away from the bending plate, and a guide rod is slidably penetrated in the connecting plate and fixed to one side of the filter box. The outer wall of the guide rod is provided with a first tension spring fixedly connected to the filter box, and the other end of the first tension spring is fixedly connected to the connecting plate; when the air guide pipe moves downward, the air guide pipe drives the lifting plate and the fixed column to move downward through the connecting sleeve, and the fixed column cooperates with the trapezoidal groove. The fixed column moves downward to drive the knocking rod outward, and the first tension spring begins to stretch. When the fixed column disengages from the trapezoidal groove, the first tension spring pulls the knocking rod to reset, and the knocking rod can knock the bending plate, so as to shake off the raw materials attached to the bending plate and the polytetrafluoroethylene film.

[0011] In a possible design, a plurality of U-shaped frames are fixed to the bottom of the transverse plate, and the U-shaped frames are used to support the synchronous belt to prevent the synchronous belt from falling and becoming out of engagement with the first synchronous wheel and the second synchronous wheel.

[0012] In a possible design, a collecting groove is provided on the bottom inner wall of the filter box, and the collecting groove is located on the side of the polytetrafluoroethylene membrane away from the knocking rod, and a return pipe is fixed to the bottom inner wall of the collecting groove, and the bottom end of the return pipe is fixedly extended into the drying cylinder, and a valve is provided in the return pipe; the knocking rod knocks the bending plate to shake off the raw materials attached to the bending plate and the polytetrafluoroethylene membrane, and then the valve on the return pipe is opened to discharge the raw materials on the collecting groove back into the drying cylinder to avoid waste of raw materials.

[0013] In a possible design, the top of the bending plate is an inclined surface for discharging raw material dust to one side, and the heating plate is located below the bending plate for heating the air filtered by the polytetrafluoroethylene membrane.

[0014] In a possible design, a plurality of first L-shaped plates are fixed to the top and bottom of the support ring, two annular grooves arranged up and down are provided at the bottom of the drying cylinder, and the plurality of first L-shaped plates are slidably matched with the corresponding annular grooves, an arc-shaped groove is provided at the bottom of the support ring, a second L-shaped plate is slidably connected in the arc-shaped groove, and one end of the second L-shaped plate is fixedly connected to the gas injection ring sleeve, a second tension spring is fixedly connected to the inner wall of one side of the arc-shaped groove, and one end of the second tension spring is fixedly connected to the second L-shaped plate, and an electromagnet is fixed to the inner wall of the other side of the arc-shaped groove, An iron sheet layer is fixed to the side of the second L-shaped plate away from the second tension spring, and a magnetic attraction force is generated between the electromagnet and the iron sheet layer, and the magnetic attraction force of the electromagnet is greater than the tension of the second tension spring; when the electromagnet is energized, the electromagnet and the iron sheet layer on one side of the second L-shaped plate generate a magnetic attraction force to pull the second L-shaped plate to one side, and the magnetic attraction force of the electromagnet is greater than the tension of the second tension spring. The second L-shaped plate drives the air injection ring sleeve to rotate, and at this time, the first air injection hole is connected to the second air injection hole, which is used to inject hot air into the drying cylinder. Otherwise, the first air injection hole can be closed to prevent the raw material from leaking into the air injection ring sleeve.

[0015] In the present application, a drying method using a drying device produced by hydroxypropyl methylcellulose comprises the following steps: S1. The raw materials are placed in the drying cylinder, and hot air is circulated and injected through the heating fan. At the same time, the electromagnet drives the air injection ring to rotate, so that the first air injection hole is connected with the second air injection hole, and the driving motor stirs the raw materials to ensure uniform drying; S2, hot air and moisture flow back to the filter box through the exhaust pipe, and are recycled after being filtered by the polytetrafluoroethylene membrane to maintain drying efficiency and air quality; S3. After drying is completed, the electric push rod lifts the closed cone and opens the bending pipe to discharge the material to the filling barrel. At the same time, the air guide pipe and the exhaust plate are deeply inserted into the filling barrel under the action of the connecting rope, and the air injection cycle is closed. Instead, hot air is directly blown to the inner wall of the filling barrel, and the inner surface of the barrel is fully dried by using the hot air flow and the rotation of the exhaust plate. S4. When the exhaust plate rotates, the bending pipe rotates in conjunction with it to achieve an annular distribution of the raw materials in the filling barrel and optimize the filling effect; S5. During the discharge process, the air guide tube descends to trigger the knocking mechanism, which automatically cleans the residual raw materials on the polytetrafluoroethylene film and the bending plate, and recycles them to the drying cylinder through the return pipe to reduce waste.

[0016] The beneficial effects of the present invention are as follows: in the present invention, the filter box is fixed with a bending plate, a polytetrafluoroethylene membrane is fixed inside the bending plate, a knocking rod is sealed and slidably penetrated inside the filter box, a trapezoidal groove is provided on one side of the knocking rod, a lifting plate is slidably connected on one side of the filter box, and a plurality of fixed columns are fixed on one side of the lifting plate; the connecting sleeve drives the lifting plate to move downward, the fixed column cooperates with the trapezoidal groove, and the fixed column moves downward to drive the knocking rod outward, and when the fixed column is out of cooperation with the trapezoidal groove, the first tension spring pulls the knocking rod to reset and knock the bending plate, so as to shake off the raw materials attached to the bending plate and the polytetrafluoroethylene membrane, and discharge the raw materials into the drying cylinder again through the return pipe, so as to avoid the waste of raw materials and avoid the adhesion to the polytetrafluoroethylene membrane to affect the air circulation; In the present invention, a connecting rope is fixed between the top of the connecting ring and one side of the connecting sleeve, a guide wheel is rotatably connected between the two connecting arms, a first synchronous wheel is provided on the outer wall fixed sleeve of the bending tube, a second synchronous wheel rotatably connected to the bottom of the horizontal plate is slidably connected to the outer wall of the air guide tube, and a plurality of arc holes are provided on the outer wall of the exhaust disk; the connecting ring moves upward, and the exhaust disk is extended into the filling barrel through the cooperation of the connecting rope, and the hot air cooperates with the arc holes to drive the exhaust disk to rotate, and the air guide tube drives the bending tube to rotate through the cooperation of the first synchronous wheel, the second synchronous wheel and the synchronous belt, so that the raw materials can be discharged in a ring shape in the filling barrel during discharge, so as to avoid the accumulation of raw materials in one position, so that the filling barrel can be filled with more raw materials; In the present invention, the bottom end of the air guide pipe penetrates the horizontal plate and is fixedly connected to the top of the exhaust disk, the outer wall of the air guide pipe is rotatably sleeved with a connecting sleeve, a connecting rope is fixed between the top of the connecting ring and one side of the connecting sleeve, the bottom of the exhaust disk is provided with a plurality of air holes, and the outer wall of the exhaust disk is provided with a plurality of arc holes; the air guide pipe and the exhaust disk move downward and extend into the filling barrel, at which time the fan injects hot air into the exhaust disk, dries the bottom inner wall of the filling barrel through the air holes, and in addition, the hot air flows outward through the arc holes, and the cooperation of the hot air and the arc holes drives the exhaust disk to rotate, which is used to dry the inner wall of the filling barrel, so as to prevent the dried raw materials from being damp again in the filling barrel; In the present invention, the dried raw materials can be evenly filled into the filling barrel, so that the filling barrel can fully hold the raw materials, and the inner wall of the filling barrel can be dried during the filling process to prevent the raw materials from getting damp in the filling barrel. In addition, when the raw materials are dried, the moisture and raw material dust carried in the hot air can be filtered, which not only ensures the dryness of the hot air in the later stage but also avoids the waste of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a drying device for producing hydroxypropyl methylcellulose provided in Example 1 of the present invention; Figure 2This is a schematic diagram of a front cross-sectional structure of a drying device for producing hydroxypropyl methylcellulose provided in Example 1 of the present invention; Figure 3 A schematic diagram of a three-dimensional cross-sectional structure of a drying cylinder of a drying device for producing hydroxypropyl methylcellulose provided in Example 1 of the present invention; Figure 4 A schematic diagram of a three-dimensional exploded structure of a sliding cylinder, a closed cone and a connecting ring of a drying device for producing hydroxypropyl methylcellulose provided in Example 1 of the present invention; Figure 5 A schematic diagram of a three-dimensional cross-sectional structure of a filter box of a drying device for producing hydroxypropyl methylcellulose provided in Example 1 of the present invention; Figure 6 A schematic diagram of a three-dimensional exploded structure of a horizontal plate, a guide wheel and a connecting corrugated hose of a drying device for producing hydroxypropyl methylcellulose provided in Example 1 of the present invention; Figure 7 A schematic diagram of a top cross-sectional structure of an exhaust plate of a drying device for producing hydroxypropyl methylcellulose provided in Example 1 of the present invention; Figure 8 A schematic diagram of a three-dimensional explosion structure of a knocking rod, a fixing column and a guide rod of a drying device for producing hydroxypropyl methylcellulose provided in Example 1 of the present invention; Fig. 9 A schematic diagram of a three-dimensional cross-sectional structure of an air injection ring sleeve of a drying device for producing hydroxypropyl methylcellulose provided in Example 2 of the present invention; Fig.10 This is a schematic diagram of the three-dimensional explosion structure of a support ring and a second L-shaped plate of a drying device for producing hydroxypropyl methylcellulose provided in Example 2 of the present invention.

[0018] In the figure: 1, drying cylinder; 2, support ring; 3, conveyor belt; 4, stirring shaft; 5, driving motor; 6, sliding cylinder; 7, stirring blade; 8, closed cone; 9, support rod; 10, connecting ring; 11, electric push rod; 12, air injection ring sleeve; 13, first air injection hole; 14, second air injection hole; 15, exhaust pipe; 16, filter box; 17, air inlet pipe; 18, fan; 19, return air hose; 20, heating plate; 21, connecting corrugated hose; 22, connecting arm; 23, cross plate; 24, guide wheel; 25, connecting rope; 26, connecting Connector; 27, air guide pipe; 28, exhaust plate; 29, air vent; 30, arc hole; 31, bending pipe; 32, first synchronous wheel; 33, second synchronous wheel; 34, U-shaped frame; 35, bending plate; 36, polytetrafluoroethylene membrane; 37, knocking rod; 38, connecting plate; 39, guide rod; 40, first tension spring; 41, lifting plate; 42, fixing column; 43, trapezoidal groove; 44, collecting groove; 45, return pipe; 46, first L-shaped plate; 47, second L-shaped plate; 48, arc groove; 49, second tension spring; 50, electromagnet. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Example 1: Reference Figure 1 and Figure 2 The drying equipment is used in the field of hydroxypropyl methylcellulose production, and mainly includes a drying cylinder 1. The outer wall of the drying cylinder 1 is fixedly sleeved with a support ring 2. The bottom of the support ring 2 is fixed with a plurality of support legs for support by welding or bolting to ensure the stable placement of the equipment. A conveyor belt 3 is provided under the drying cylinder 1, and the conveyor belt 3 is used to transport filling barrels to receive the dried raw materials.

[0021] Reference Figure 2 and Figure 3 A bending pipe 31 is rotatably passed through the bottom of the drying cylinder 1. The design of the bending pipe 31 enables the raw materials to be smoothly discharged from the bottom of the drying cylinder 1 into the filling barrel.

[0022] Reference Figure 1-Figure 3 The equipment also includes an air injection ring 12 sleeved on the outer wall of the drying cylinder 1, and the air injection ring 12 is connected to the filter box 16 through a pipeline, and is used to inject hot air into the drying cylinder 1 to complete the drying operation. A return air hose 19 is provided at the bottom of the filter box 16, and the return air hose 19 guides the heated air from the filter box 16 into the air injection ring 12.

[0023] Reference Figure 1 and Figure 2In order to recover the hot air and raw material dust in the drying cylinder 1, an exhaust pipe 15 is provided on the top of the drying cylinder 1. One end of the exhaust pipe 15 is connected to the filter box 16 to ensure that the hot air and dust can enter the filter box 16 for recovery.

[0024] Reference Figure 1-Figure 4 , a drying structure is provided in the drying cylinder 1, specifically including a stirring shaft 4 rotating on the inner wall of the top of the drying cylinder 1. A driving motor 5 is fixed on the top of the drying cylinder 1, and the output shaft of the driving motor 5 is fixedly connected to the top of the stirring shaft 4 through a coupling to drive the stirring shaft 4 to rotate. The outer wall of the stirring shaft 4 is provided with a sliding cylinder 6 through a sliding groove and a sliding block sliding sleeve, and a plurality of stirring blades 7 are fixed on the outer wall of the sliding cylinder 6 to achieve the stirring of the raw materials. A plurality of first air injection holes 13 are provided in the drying cylinder 1, and a plurality of second air injection holes 14 corresponding to the first air injection holes 13 are provided on the inner wall of the air injection ring sleeve 12. By opening the valve on the air inlet pipe 17, the fan 18 sucks the outside air into the filter box 16, and the heating plate 20 heats the air. Then the fan 18 injects the hot air into the air injection ring sleeve 12 through the return air hose 19, and then through the cooperation of the first air injection hole 13 and the second air injection hole 14, the hot air is injected into the drying cylinder 1 to dry the raw materials.

[0025] Reference Figure 2 , Figure 6 and Figure 7 , a drying structure is provided below the drying cylinder 1, specifically including two connecting arms 22, which are fixed to the bottom of the drying cylinder 1 and connected by a horizontal plate 23 fixed at the bottom. The bottom end of the air guide pipe 27 passes through the horizontal plate 23, and a valve is provided inside the air guide pipe 27 to control the flow of hot air. The outer wall of the air guide pipe 27 is provided with a connecting sleeve 26 to ensure the stability of the air guide pipe 27 during movement. The exhaust plate 28 is fixed at the bottom end of the air guide pipe 27, and a plurality of air holes 29 are provided at the bottom thereof for drying the inner wall of the bottom of the filling barrel, and a plurality of arc holes 30 are provided on the outer wall for drying the inner wall of the filling barrel. The hot air is introduced into the exhaust plate 28 from the return air hose 19 through the connecting corrugated hose 21, and the filling barrel is dried in all directions through the air holes 29 and the arc holes 30. At the same time, the cooperation between the hot air and the arc holes 30 can also drive the exhaust plate 28 to rotate, thereby improving the drying efficiency.

[0026] Reference Figure 3 , Figure 4 and Figure 6 The discharge structure is mainly realized by the bending tube 31. When the raw material is dried, the raw material is discharged into the filling barrel below by controlling the rotation and position adjustment of the bending tube 31.

[0027] Setting of closed cone 8: A closed cone 8 is set inside the drying cylinder 1, and the outer wall of the closed cone 8 is tightly fitted with the inner wall of the drying cylinder 1, which is used to block the bending tube 31 when necessary. This design ensures that the raw materials will not be accidentally discharged through the bending tube 31 during the drying process.

[0028] Coordination between the stirring shaft 4 and the stirring blade 7: The bottom end of the stirring shaft 4 passes through the closed cone 8, and the stirring blade 7 at the bottom cooperates with the top of the closed cone 8 to ensure that the raw materials can be evenly mixed during the stirring process and prevent the raw materials from accumulating on the top of the closed cone 8.

[0029] Connection between the support rod 9 and the electric push rod 11: A plurality of support rods 9 are fixed to the bottom of the closed cone 8, and the bottom ends of these support rods 9 slide through the bottom inner wall of the drying cylinder 1 and are fixed to a connecting ring 10. An electric push rod 11 is fixedly embedded in the bottom of the drying cylinder 1, and its output shaft is fixedly connected to the top of the connecting ring 10. When the electric push rod 11 is working, the closed cone 8 is driven to move upward through the cooperation of the connecting ring 10 and the support rod 9, thereby releasing the sealing of the bending tube 31.

[0030] Linkage between the connecting rope 25 and the exhaust disk 28: A connecting rope 25 is provided at the top of the connecting ring 10, and the other end of the connecting rope 25 is fixedly connected to the connecting sleeve 26. A guide wheel 24 is rotatably connected between the two connecting arms 22 to guide the connecting rope 25. When the closed cone 8 moves upward, the connecting ring 10 is pulled by the connecting rope 25 to extend the exhaust disk 28 and the air guide pipe 27 thereon into the filling barrel.

[0031] Transmission of synchronous wheel and synchronous belt: The outer wall of the bending tube 31 is fixedly sleeved with a first synchronous wheel 32, and the outer wall of the air guide tube 27 is slidably connected to the second synchronous wheel 33 through a slider and a slide groove, and the second synchronous wheel 33 is rotatably connected to the bottom of the cross plate 23. The first synchronous wheel 32 and the second synchronous wheel 33 are connected by a synchronous belt transmission. When the air guide tube 27 rotates, the bending tube 31 is driven to rotate synchronously through the transmission of the synchronous belt, so that the raw materials are distributed in a ring shape in the filling barrel during discharge to avoid accumulation.

[0032] Reference Figure 2 , Figure 5 , Figure 6 and Figure 8 The recovery structure is integrated in the filter box 16. Through the design of the filter box 16, the hot air and raw material dust can be effectively recovered, and the heated air can be recycled to improve energy efficiency and reduce dust pollution to the environment. The design of the recovery structure is to recover and filter the moisture and raw material dust in the hot air, which is specifically implemented as follows: Filtering of the bending plate 35 and the polytetrafluoroethylene membrane 36: The bending plate 35 is arranged in the filter box 16, and the air inlet pipe 17 is located above the bending plate 35. A polytetrafluoroethylene membrane 36 is fixed in the bending plate 35 for efficiently filtering the moisture and raw material dust in the hot air.

[0033] Automatic knocking of the knocking rod 37: The knocking rod 37 is sealed and slidably penetrated in the filter box 16, and is used to knock the bending plate 35 to remove the raw materials attached thereto. A trapezoidal groove 43 is provided on one side of the knocking rod 37, and a lifting plate 41 is slidably connected to one side of the filter box 16, and the bottom end of the lifting plate 41 is fixedly connected to the top of the connecting sleeve 26. A plurality of fixed columns 42 are fixed on one side of the lifting plate 41, and these fixed columns 42 cooperate with the trapezoidal groove 43. A connecting plate 38 is fixed on one end of the knocking rod 37, and a guide rod 39 fixedly connected to the filter box 16 is slidably penetrated in the connecting plate 38. When the air guide pipe 27 moves downward, the lifting plate 41 and the fixed column 42 are driven downward through the connecting sleeve 26, and the fixed column 42 cooperates with the trapezoidal groove 43 to drive the knocking rod 37 outward, and at this time the first tension spring 40 begins to stretch. When the fixing column 42 is out of engagement with the trapezoidal groove 43 , the first tension spring 40 pulls the knocking rod 37 to return to its original position, and the knocking rod 37 knocks the bending plate 35 , thereby realizing automatic dust cleaning.

[0034] Reference Figure 6 In order to ensure that the synchronous belt does not fall or detach from the first synchronous wheel 32 and the second synchronous wheel 33 during the transmission process, a plurality of U-shaped frames 34 are fixed at the bottom of the cross plate 23. These U-shaped frames 34 are used to support the synchronous belt to ensure the stability and reliability of the transmission.

[0035] Reference Figure 2 and Figure 5 In order to achieve effective recovery of raw materials and reduce waste, the structure of the filter box 16 is specially designed in this embodiment. Specifically, a collecting groove 44 is provided on the bottom inner wall of the filter box 16, and the collecting groove 44 is located on the side of the polytetrafluoroethylene membrane 36 away from the knocking rod 37. In this way, when the knocking rod 37 knocks the bending plate 35 regularly, the raw materials attached to the bending plate 35 and the polytetrafluoroethylene membrane 36 will be shaken into the collecting groove 44. In order to reuse these raw materials, a return pipe 45 is fixed to the bottom inner wall of the collecting groove 44, and the bottom end of the return pipe 45 is fixedly extended to the inside of the drying cylinder 1. A valve is provided in the return pipe 45. When it is necessary to recover the raw materials, the valve only needs to be opened, and the raw materials in the collecting groove 44 can be re-discharged into the drying cylinder 1 through the return pipe 45, thereby effectively avoiding the waste of raw materials.

[0036] Reference Figure 5In order to further optimize the processing of raw material dust and the air heating effect, the present embodiment specifically designs the position and shape of the bending plate 35 and the heating plate 20. The top of the bending plate 35 is designed as an inclined surface, which helps to discharge the raw material dust to one side for subsequent processing. At the same time, the heating plate 20 is installed under the bending plate 35, and its function is to heat the air filtered by the polytetrafluoroethylene membrane 36. Through such a layout, not only the efficiency of air heating can be improved, but also it can ensure that the heated air can flow evenly to the raw materials in the drying cylinder 1, thereby improving the drying effect.

[0037] The above embodiments describe in detail the specific structure and operation mode of the drying equipment for the production of hydroxypropyl methylcellulose, ensuring the feasibility and operability of the equipment.

[0038] Example 2: Reference Fig. 9 and Fig.10 , improved on the basis of Example 1: In order to achieve accurate injection of hot air during the drying process and prevent leakage of raw materials, this embodiment makes an innovative design for the connection structure between the support ring 2 and the drying cylinder 1. A plurality of first L-shaped plates 46 are fixed to the top and bottom of the support ring 2, and two annular grooves arranged vertically are provided at the bottom of the drying cylinder 1. These first L-shaped plates 46 are slidably matched with the corresponding annular grooves, thereby ensuring that the support ring 2 can move stably and flexibly relative to the drying cylinder 1.

[0039] refer to Fig. 9 and Fig.10 In addition, an arc-shaped groove 48 is provided at the bottom of the support ring 2, and a second L-shaped plate 47 is slidably connected in the arc-shaped groove 48, and one end of the second L-shaped plate 47 is fixedly connected to the gas injection ring sleeve 12. A second tension spring 49 is fixedly connected to the inner wall of one side of the arc-shaped groove 48, and the other end of the second tension spring 49 is fixedly connected to the second L-shaped plate 47 to provide a reset force. At the same time, an electromagnet 50 is also fixed to the inner wall of the other side of the arc-shaped groove 48. When the electromagnet 50 is energized, it will generate a magnetic attraction with the iron layer on one side of the second L-shaped plate 47. The magnetic attraction is greater than the tension of the second tension spring 49, thereby pushing the second L-shaped plate 47 to move to one side.

[0040] This design enables the second L-shaped plate 47 to drive the gas injection ring 12 connected thereto to rotate when the electromagnet 50 is powered on, thereby connecting the first gas injection hole 13 with the second gas injection hole 14, thereby allowing hot air to be injected into the drying cylinder 1 through these two holes. When the electromagnet 50 is powered off, the tension of the second tension spring 49 will reset the second L-shaped plate 47, thereby closing the first gas injection hole 13, thereby preventing the raw material from leaking into the gas injection ring 12 during the drying process. This design not only ensures the accurate injection of hot air, but also effectively prevents the leakage of raw materials.

[0041] A drying method for a drying device for producing hydroxypropyl methylcellulose, comprising the following steps: S1. Put the raw materials into the drying cylinder 1. When drying, open the valve on the air inlet pipe 17, and the fan 18 is running. The outside air is sucked into the filter box 16 through the air inlet pipe 17, and the heating plate 20 is used to heat the air. Then the fan 18 injects the hot air into the air injection ring sleeve 12 through the return air hose 19. The electromagnet 50 is energized. The electromagnet 50 and the iron layer on one side of the second L-shaped plate 47 generate a magnetic attraction to pull the second L-shaped plate 47 to one side. The magnetic attraction of the electromagnet 50 is greater than the tension of the second tension spring 49. The second L-shaped plate 47 drives the air injection ring sleeve 12 to rotate. At this time, the first air injection hole 13 is connected with the second air injection hole 14. The hot air in the air injection ring sleeve 12 is injected into the drying cylinder 1 to dry the raw materials. Then the driving motor 5 drives the stirring shaft 4, the sliding cylinder 6 and the stirring blade 7 to rotate to stir the raw materials so that the raw materials are evenly dried. S2. During the drying process, the hot air and moisture in the drying cylinder 1 flow back to the filter box 16 through the exhaust pipe 15, and are discharged into the drying cylinder 1 by the fan 18 for the reuse of heat energy. The polytetrafluoroethylene membrane 36 can filter the moisture in the hot air and the raw material dust contained therein, ensuring the dryness of the air injected into the drying cylinder 1 by the fan 18; S3. After drying is completed, the output shaft of the electric push rod 11 drives the closed cone 8 and the sliding cylinder 6 to move upward through the cooperation of the connecting ring 10 and the supporting rod 9, and releases the sealing of the closed cone 8 on the bending tube 31. At this time, the dried raw materials are discharged into the filling barrel through the bending tube 31, and the next filling barrel to be filled can be dried at this time; in specific operations, the connecting ring 10 and the connecting sleeve 26 are connected by the connecting rope 25, the connecting ring 10 moves upward, and the air guide pipe 27 and the exhaust plate 28 move downward and extend to In the filling barrel, the valve on the air guide pipe 27 is opened, the electromagnet 50 is powered off, the second L-shaped plate 47 is reset under the tension of the second tension spring 49, the first air injection hole 13 and the second air injection hole 14 are misaligned, and the fan 18 injects hot air into the exhaust plate 28, and dries the bottom inner wall of the filling barrel through the air vent 29. In addition, the hot air flows outward through the arc hole 30, and the cooperation between the hot air and the arc hole 30 drives the exhaust plate 28 to rotate, which is used to dry the inner wall of the filling barrel; S4. In addition, when the exhaust plate 28 rotates, the air guide pipe 27 is driven to rotate. The air guide pipe 27 drives the bending pipe 31 to rotate through the cooperation of the first synchronous wheel 32, the second synchronous wheel 33 and the synchronous belt. When discharging, the raw materials can be discharged in a ring shape in the filling barrel to avoid the accumulation of raw materials in one position, so that the filling barrel can be filled with more raw materials; S5. In addition, when the air guide tube 27 moves downward, the air guide tube 27 drives the lifting plate 41 and the fixed column 42 to move downward through the connecting sleeve 26. The fixed column 42 cooperates with the trapezoidal groove 43. The fixed column 42 moves downward to drive the knocking rod 37 outward, and the first tension spring 40 begins to stretch. When the fixed column 42 is out of cooperation with the trapezoidal groove 43, the first tension spring 40 pulls the knocking rod 37 to reset. The knocking rod 37 can knock the bending plate 35 to shake off the raw materials attached to the bending plate 35 and the polytetrafluoroethylene film 36, and then open the valve on the return pipe 45 to discharge the raw materials on the collecting tank 44 back into the drying cylinder 1 to avoid waste of raw materials.

[0042] However, as is well known to those skilled in the art, the working principles and wiring methods of the electromagnet 50, fan 18, heating plate 20, electric push rod 11 and drive motor 5 are commonplace, and are all conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any optional selections according to their needs or convenience.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A drying device for the production of hydroxypropyl methylcellulose, characterized in that: The drying cylinder (1) comprises a drying cylinder (1), wherein a support ring (2) is fixedly sleeved on the outer wall of the drying cylinder (1), a plurality of support legs are fixedly mounted on the bottom of the support ring (2) for supporting, a conveyor belt (3) is arranged below the drying cylinder (1) for transporting filling barrels, and a bent pipe (31) is rotatably penetrated through the bottom of the drying cylinder (1) for discharging raw materials into the filling barrels; It also includes an air injection ring (12) which is sleeved on the outer wall of the drying cylinder (1) and is used to inject hot air into the drying cylinder (1) to complete the drying operation; a filter box (16) is fixed to one side of the drying cylinder (1); a return air hose (19) is provided at the bottom of the filter box (16) and is used to inject hot air into the air injection ring (12); It also includes an exhaust pipe (15) which is arranged at the top of the drying cylinder (1), one end of the exhaust pipe (15) being connected to a filter box (16) for recovering hot air and raw material dust in the drying cylinder (1); An air guide pipe (27) is arranged on one side of the drying cylinder (1), and an exhaust plate (28) is fixed to the bottom end of the air guide pipe (27) for drying the filling barrel to be filled; A drying structure, arranged in the drying cylinder (1), and used for drying the raw materials in the drying cylinder (1); A drying structure, arranged below the drying cylinder (1), for drying the filling barrel to be filled; A discharge structure, arranged in the drying cylinder (1), for filling the dried raw materials into a filling barrel; The recovery structure is arranged in the filter box (16) and is used to recover the hot air and raw material dust.

2. A drying device for the production of hydroxypropyl methylcellulose according to claim 1, characterized in that: The drying structure comprises a stirring shaft (4) rotating on the inner wall of the top of a drying cylinder (1); a driving motor (5) is fixed on the top of the drying cylinder (1); the output shaft of the driving motor (5) is fixedly connected to the top of the stirring shaft (4) via a coupling; the outer wall of the stirring shaft (4) is provided with a sliding cylinder (6) via a sliding groove and a sliding block sliding sleeve; a plurality of stirring blades (7) for stirring raw materials are fixed to the outer wall of the sliding cylinder (6); a plurality of first air injection holes (13) are provided in the drying cylinder (1); a plurality of second air injection holes (14) are provided on the inner wall of the air injection ring sleeve (12); and the first air injection holes (13) cooperate with the second air injection holes (14) to inject air into the drying cylinder (1). ), an air inlet pipe (17) is fixed on one side of the filter box (16), a valve is provided in the air inlet pipe (17) for injecting outside air into the filter box (16) for heating, a plurality of heating plates (20) are fixed on the inner wall of the filter box (16) close to the air inlet pipe (17) for heating the air entering the filter box (16), a fan (18) is fixed on the bottom of the filter box (16) through a frame, an air inlet of the fan (18) extends into the filter box (16), an air outlet of the fan (18) is connected to a return air hose (19), and one end of the return air hose (19) is connected to the air injection ring sleeve (12).

3. A drying device for the production of hydroxypropyl methylcellulose according to claim 2, characterized in that: The drying structure comprises two connecting arms (22) at the bottom of the drying cylinder (1), the bottom ends of the two connecting arms (22) are fixed with a same horizontal plate (23), the bottom end of the air guide pipe (27) passes through the horizontal plate (23), a valve is arranged in the air guide pipe (27), the outer wall of the air guide pipe (27) is rotatably sleeved with a connecting sleeve (26), a plurality of air holes (29) are arranged at the bottom of the exhaust plate (28) for drying the inner wall of the bottom of the filling barrel, a plurality of arc holes (30) are arranged at the outer wall of the exhaust plate (28) for drying the inner wall of the filling barrel, and the hot air cooperates with the arc holes (30) to drive the exhaust plate (28) to rotate, the top end of the air guide pipe (27) is rotatably connected to the connecting corrugated hose (21), and the connecting corrugated hose (21) is communicated with the return air hose (19) for injecting hot air into the exhaust plate (28).

4. A drying device for the production of hydroxypropyl methylcellulose according to claim 3, characterized in that: The discharge structure comprises a closed cone (8) arranged in the drying cylinder (1), and the outer wall of the closed cone (8) is fitted with the inner wall of the drying cylinder (1) for sealing the bent tube (31); the bottom end of the stirring shaft (4) passes through the closed cone (8), and the stirring blade (7) located at the bottom cooperates with the top of the closed cone (8); a plurality of support rods (9) are fixed to the bottom of the closed cone (8), and the bottom ends of the plurality of support rods (9) all slide through the bottom inner wall of the drying cylinder (1) and are all fixed with the same connecting ring (10); an electric push rod (11) is fixedly embedded at the bottom of the drying cylinder (1), and the output shaft of the electric push rod (11) The connecting ring (10) is fixedly connected to the top of the connecting ring (10), the top of the connecting ring (10) is provided with a connecting rope (25), the other end of the connecting rope (25) is fixedly connected to the connecting sleeve (26), a guide wheel (24) is rotatably connected between the two connecting arms (22) for guiding the connecting rope (25), the outer wall fixed sleeve of the bending tube (31) is provided with a first synchronous wheel (32), the outer wall of the air guide tube (27) is slidably connected to a second synchronous wheel (33) through a slider and a slide groove, and the second synchronous wheel (33) is rotatably connected to the bottom of the cross plate (23), and the first synchronous wheel (32) and the second synchronous wheel (33) are connected by a synchronous belt transmission.

5. A drying device for the production of hydroxypropyl methylcellulose according to claim 4, characterized in that: The recovery structure comprises a bending plate (35) fixed in the filter box (16), the air inlet pipe (17) is located above the bending plate (35), a polytetrafluoroethylene membrane (36) is fixed in the bending plate (35) for filtering moisture and raw material dust in the hot air, a knocking rod (37) is sealed and slidably penetrated in the filter box (16), and the knocking rod (37) is used to knock the bending plate (35), a trapezoidal groove (43) is provided on one side of the knocking rod (37), a lifting plate (41) is slidably connected to one side of the filter box (16), and the bottom end of the lifting plate (41) is connected to the bottom end of the connecting sleeve (26). The top is fixedly connected, a plurality of fixing columns (42) are fixed on one side of the lifting plate (41), and the fixing columns (42) cooperate with the trapezoidal grooves (43) to drive the knocking rod (37) to move outward, and a connecting plate (38) is fixed on one end of the knocking rod (37) away from the bending plate (35), and a guide rod (39) slides through the connecting plate (38), and the guide rod (39) is fixed to one side of the filter box (16), and the outer wall of the guide rod (39) is provided with a first tension spring (40) fixedly connected to the filter box (16), and the other end of the first tension spring (40) is fixedly connected to the connecting plate (38).

6. A drying device for the production of hydroxypropyl methylcellulose according to claim 5, characterized in that: A plurality of U-shaped frames (34) are fixed to the bottom of the transverse plate (23), and the U-shaped frames (34) are used to support the synchronous belt.

7. A drying device for the production of hydroxypropyl methylcellulose according to claim 6, characterized in that: A collecting groove (44) is provided on the inner wall at the bottom of the filter box (16), and the collecting groove (44) is located on a side of the polytetrafluoroethylene membrane (36) away from the knocking rod (37). A return pipe (45) is fixed to the inner wall at the bottom of the collecting groove (44), and the bottom end of the return pipe (45) is fixedly extended into the drying cylinder (1), and a valve is provided in the return pipe (45).

8. A drying device for the production of hydroxypropyl methylcellulose according to claim 7, characterized in that: The top of the bending plate (35) is an inclined surface, which is used to discharge raw material dust to one side, and the heating plate (20) is located below the bending plate (35).

9. A drying device for the production of hydroxypropyl methylcellulose according to claim 8, characterized in that: A plurality of first L-shaped plates (46) are fixed to the top and bottom of the support ring (2); two annular grooves arranged in an up-and-down manner are provided at the bottom of the drying cylinder (1); and the plurality of first L-shaped plates (46) are slidably matched with the corresponding annular grooves; an arc-shaped groove (48) is provided at the bottom of the support ring (2); a second L-shaped plate (47) is slidably connected in the arc-shaped groove (48); and one end of the second L-shaped plate (47) is fixedly connected to the gas injection ring sleeve (12); a second tension spring (49) is fixedly connected to the inner wall of one side of the arc-shaped groove (48); and one end of the second tension spring (49) is fixedly connected to the second L-shaped plate (47); an electromagnet (50) is fixedly connected to the inner wall of the other side of the arc-shaped groove (48); and an iron sheet layer is fixedly provided on the side of the second L-shaped plate (47) away from the second tension spring (49); a magnetic attraction force is generated between the electromagnet (50) and the iron sheet layer; and the magnetic attraction force of the electromagnet (50) is greater than the tension force of the second tension spring (49).

10. A drying method using the drying device for producing hydroxypropyl methylcellulose according to claim 9, characterized in that: The following steps are involved: S1. The raw material is placed in a drying cylinder (1), and hot air is circulated and injected through a heating fan (18). At the same time, an electromagnet (50) drives an air injection ring (12) to rotate, thereby connecting the first air injection hole (13) with the second air injection hole (14), and a driving motor (5) stirs the raw material to ensure uniform drying. S2, hot air and moisture flow back to the filter box (16) through the exhaust pipe (15), and are recycled after being filtered by the polytetrafluoroethylene membrane (36) to maintain drying efficiency and air quality; S3. After the drying is completed, the electric push rod (11) lifts the closed cone (8) and opens the bending pipe (31) to discharge the material into the filling barrel; at the same time, the air guide pipe (27) and the exhaust plate (28) are inserted into the filling barrel under the action of the connecting rope (25), and the air injection cycle is closed, and hot air is directly blown to the inner wall of the filling barrel, and the inner surface of the barrel is completely dried by utilizing the hot air flow and the rotation of the exhaust plate (28); S4, when the exhaust plate (28) rotates, the bending pipe (31) rotates in conjunction with the rotation, so as to achieve an annular distribution of the raw materials in the filling barrel and optimize the filling effect; S5. During the discharge process, the air guide pipe (27) descends to trigger the knocking mechanism, which automatically cleans the residual raw materials on the polytetrafluoroethylene film (36) and the bending plate (35), and recycles them into the drying cylinder (1) through the return pipe (45), thereby reducing waste.

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